1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <linux/uaccess.h> 37 38 /* 39 * Version Information 40 */ 41 #define DRIVER_VERSION "1.3.1" 42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 43 44 /* 45 * 16C50 UART register defines 46 */ 47 48 #define LCR_BITS_5 0x00 /* 5 bits/char */ 49 #define LCR_BITS_6 0x01 /* 6 bits/char */ 50 #define LCR_BITS_7 0x02 /* 7 bits/char */ 51 #define LCR_BITS_8 0x03 /* 8 bits/char */ 52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 53 54 #define LCR_STOP_1 0x00 /* 1 stop bit */ 55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 58 59 #define LCR_PAR_NONE 0x00 /* No parity */ 60 #define LCR_PAR_ODD 0x08 /* Odd parity */ 61 #define LCR_PAR_EVEN 0x18 /* Even parity */ 62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 65 66 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 68 69 #define MCR_DTR 0x01 /* Assert DTR */ 70 #define MCR_RTS 0x02 /* Assert RTS */ 71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 75 76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 80 81 /* 82 * Defines used for sending commands to port 83 */ 84 85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ 86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ 87 88 #define MOS_PORT1 0x0200 89 #define MOS_PORT2 0x0300 90 #define MOS_VENREG 0x0000 91 #define MOS_MAX_PORT 0x02 92 #define MOS_WRITE 0x0E 93 #define MOS_READ 0x0D 94 95 /* Requests */ 96 #define MCS_RD_RTYPE 0xC0 97 #define MCS_WR_RTYPE 0x40 98 #define MCS_RDREQ 0x0D 99 #define MCS_WRREQ 0x0E 100 #define MCS_CTRL_TIMEOUT 500 101 #define VENDOR_READ_LENGTH (0x01) 102 103 #define MAX_NAME_LEN 64 104 105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 107 108 /* For higher baud Rates use TIOCEXBAUD */ 109 #define TIOCEXBAUD 0x5462 110 111 /* vendor id and device id defines */ 112 113 /* The native mos7840/7820 component */ 114 #define USB_VENDOR_ID_MOSCHIP 0x9710 115 #define MOSCHIP_DEVICE_ID_7840 0x7840 116 #define MOSCHIP_DEVICE_ID_7820 0x7820 117 /* The native component can have its vendor/device id's overridden 118 * in vendor-specific implementations. Such devices can be handled 119 * by making a change here, in moschip_port_id_table, and in 120 * moschip_id_table_combined 121 */ 122 #define USB_VENDOR_ID_BANDB 0x0856 123 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 124 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 125 126 /* Interrupt Routine Defines */ 127 128 #define SERIAL_IIR_RLS 0x06 129 #define SERIAL_IIR_MS 0x00 130 131 /* 132 * Emulation of the bit mask on the LINE STATUS REGISTER. 133 */ 134 #define SERIAL_LSR_DR 0x0001 135 #define SERIAL_LSR_OE 0x0002 136 #define SERIAL_LSR_PE 0x0004 137 #define SERIAL_LSR_FE 0x0008 138 #define SERIAL_LSR_BI 0x0010 139 140 #define MOS_MSR_DELTA_CTS 0x10 141 #define MOS_MSR_DELTA_DSR 0x20 142 #define MOS_MSR_DELTA_RI 0x40 143 #define MOS_MSR_DELTA_CD 0x80 144 145 /* Serial Port register Address */ 146 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 147 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 148 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 149 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 150 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 151 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 152 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 153 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 154 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 155 156 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 157 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 158 159 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 160 161 /* 162 * URB POOL related defines 163 */ 164 #define NUM_URBS 16 /* URB Count */ 165 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 166 167 168 static struct usb_device_id moschip_port_id_table[] = { 169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 171 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 172 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 173 {} /* terminating entry */ 174 }; 175 176 static __devinitdata struct usb_device_id moschip_id_table_combined[] = { 177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 179 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 181 {} /* terminating entry */ 182 }; 183 184 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 185 186 /* This structure holds all of the local port information */ 187 188 struct moschip_port { 189 int port_num; /*Actual port number in the device(1,2,etc) */ 190 struct urb *write_urb; /* write URB for this port */ 191 struct urb *read_urb; /* read URB for this port */ 192 struct urb *int_urb; 193 __u8 shadowLCR; /* last LCR value received */ 194 __u8 shadowMCR; /* last MCR value received */ 195 char open; 196 char open_ports; 197 char zombie; 198 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 199 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 200 int delta_msr_cond; 201 struct async_icount icount; 202 struct usb_serial_port *port; /* loop back to the owner of this object */ 203 204 /* Offsets */ 205 __u8 SpRegOffset; 206 __u8 ControlRegOffset; 207 __u8 DcrRegOffset; 208 /* for processing control URBS in interrupt context */ 209 struct urb *control_urb; 210 struct usb_ctrlrequest *dr; 211 char *ctrl_buf; 212 int MsrLsr; 213 214 spinlock_t pool_lock; 215 struct urb *write_urb_pool[NUM_URBS]; 216 char busy[NUM_URBS]; 217 }; 218 219 220 static int debug; 221 222 /* 223 * mos7840_set_reg_sync 224 * To set the Control register by calling usb_fill_control_urb function 225 * by passing usb_sndctrlpipe function as parameter. 226 */ 227 228 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 229 __u16 val) 230 { 231 struct usb_device *dev = port->serial->dev; 232 val = val & 0x00ff; 233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 234 235 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 236 MCS_WR_RTYPE, val, reg, NULL, 0, 237 MOS_WDR_TIMEOUT); 238 } 239 240 /* 241 * mos7840_get_reg_sync 242 * To set the Uart register by calling usb_fill_control_urb function by 243 * passing usb_rcvctrlpipe function as parameter. 244 */ 245 246 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 247 __u16 *val) 248 { 249 struct usb_device *dev = port->serial->dev; 250 int ret = 0; 251 252 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 253 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, 254 MOS_WDR_TIMEOUT); 255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); 256 *val = (*val) & 0x00ff; 257 return ret; 258 } 259 260 /* 261 * mos7840_set_uart_reg 262 * To set the Uart register by calling usb_fill_control_urb function by 263 * passing usb_sndctrlpipe function as parameter. 264 */ 265 266 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 267 __u16 val) 268 { 269 270 struct usb_device *dev = port->serial->dev; 271 val = val & 0x00ff; 272 /* For the UART control registers, the application number need 273 to be Or'ed */ 274 if (port->serial->num_ports == 4) { 275 val |= (((__u16) port->number - 276 (__u16) (port->serial->minor)) + 1) << 8; 277 dbg("mos7840_set_uart_reg application number is %x\n", val); 278 } else { 279 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 280 val |= (((__u16) port->number - 281 (__u16) (port->serial->minor)) + 1) << 8; 282 dbg("mos7840_set_uart_reg application number is %x\n", 283 val); 284 } else { 285 val |= 286 (((__u16) port->number - 287 (__u16) (port->serial->minor)) + 2) << 8; 288 dbg("mos7840_set_uart_reg application number is %x\n", 289 val); 290 } 291 } 292 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 293 MCS_WR_RTYPE, val, reg, NULL, 0, 294 MOS_WDR_TIMEOUT); 295 296 } 297 298 /* 299 * mos7840_get_uart_reg 300 * To set the Control register by calling usb_fill_control_urb function 301 * by passing usb_rcvctrlpipe function as parameter. 302 */ 303 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 304 __u16 *val) 305 { 306 struct usb_device *dev = port->serial->dev; 307 int ret = 0; 308 __u16 Wval; 309 310 /* dbg("application number is %4x \n", 311 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 312 /* Wval is same as application number */ 313 if (port->serial->num_ports == 4) { 314 Wval = 315 (((__u16) port->number - (__u16) (port->serial->minor)) + 316 1) << 8; 317 dbg("mos7840_get_uart_reg application number is %x\n", Wval); 318 } else { 319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 320 Wval = (((__u16) port->number - 321 (__u16) (port->serial->minor)) + 1) << 8; 322 dbg("mos7840_get_uart_reg application number is %x\n", 323 Wval); 324 } else { 325 Wval = (((__u16) port->number - 326 (__u16) (port->serial->minor)) + 2) << 8; 327 dbg("mos7840_get_uart_reg application number is %x\n", 328 Wval); 329 } 330 } 331 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 332 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 333 MOS_WDR_TIMEOUT); 334 *val = (*val) & 0x00ff; 335 return ret; 336 } 337 338 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 339 { 340 341 dbg("***************************************\n"); 342 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 343 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); 344 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); 345 dbg("***************************************\n"); 346 347 } 348 349 /************************************************************************/ 350 /************************************************************************/ 351 /* I N T E R F A C E F U N C T I O N S */ 352 /* I N T E R F A C E F U N C T I O N S */ 353 /************************************************************************/ 354 /************************************************************************/ 355 356 static inline void mos7840_set_port_private(struct usb_serial_port *port, 357 struct moschip_port *data) 358 { 359 usb_set_serial_port_data(port, (void *)data); 360 } 361 362 static inline struct moschip_port *mos7840_get_port_private(struct 363 usb_serial_port 364 *port) 365 { 366 return (struct moschip_port *)usb_get_serial_port_data(port); 367 } 368 369 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 370 { 371 struct moschip_port *mos7840_port; 372 struct async_icount *icount; 373 mos7840_port = port; 374 icount = &mos7840_port->icount; 375 if (new_msr & 376 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 377 MOS_MSR_DELTA_CD)) { 378 icount = &mos7840_port->icount; 379 380 /* update input line counters */ 381 if (new_msr & MOS_MSR_DELTA_CTS) { 382 icount->cts++; 383 smp_wmb(); 384 } 385 if (new_msr & MOS_MSR_DELTA_DSR) { 386 icount->dsr++; 387 smp_wmb(); 388 } 389 if (new_msr & MOS_MSR_DELTA_CD) { 390 icount->dcd++; 391 smp_wmb(); 392 } 393 if (new_msr & MOS_MSR_DELTA_RI) { 394 icount->rng++; 395 smp_wmb(); 396 } 397 } 398 } 399 400 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 401 { 402 struct async_icount *icount; 403 404 dbg("%s - %02x", __func__, new_lsr); 405 406 if (new_lsr & SERIAL_LSR_BI) { 407 /* 408 * Parity and Framing errors only count if they 409 * occur exclusive of a break being 410 * received. 411 */ 412 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 413 } 414 415 /* update input line counters */ 416 icount = &port->icount; 417 if (new_lsr & SERIAL_LSR_BI) { 418 icount->brk++; 419 smp_wmb(); 420 } 421 if (new_lsr & SERIAL_LSR_OE) { 422 icount->overrun++; 423 smp_wmb(); 424 } 425 if (new_lsr & SERIAL_LSR_PE) { 426 icount->parity++; 427 smp_wmb(); 428 } 429 if (new_lsr & SERIAL_LSR_FE) { 430 icount->frame++; 431 smp_wmb(); 432 } 433 } 434 435 /************************************************************************/ 436 /************************************************************************/ 437 /* U S B C A L L B A C K F U N C T I O N S */ 438 /* U S B C A L L B A C K F U N C T I O N S */ 439 /************************************************************************/ 440 /************************************************************************/ 441 442 static void mos7840_control_callback(struct urb *urb) 443 { 444 unsigned char *data; 445 struct moschip_port *mos7840_port; 446 __u8 regval = 0x0; 447 int result = 0; 448 int status = urb->status; 449 450 mos7840_port = urb->context; 451 452 switch (status) { 453 case 0: 454 /* success */ 455 break; 456 case -ECONNRESET: 457 case -ENOENT: 458 case -ESHUTDOWN: 459 /* this urb is terminated, clean up */ 460 dbg("%s - urb shutting down with status: %d", __func__, 461 status); 462 return; 463 default: 464 dbg("%s - nonzero urb status received: %d", __func__, 465 status); 466 goto exit; 467 } 468 469 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length); 470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__, 471 mos7840_port->MsrLsr, mos7840_port->port_num); 472 data = urb->transfer_buffer; 473 regval = (__u8) data[0]; 474 dbg("%s data is %x\n", __func__, regval); 475 if (mos7840_port->MsrLsr == 0) 476 mos7840_handle_new_msr(mos7840_port, regval); 477 else if (mos7840_port->MsrLsr == 1) 478 mos7840_handle_new_lsr(mos7840_port, regval); 479 480 exit: 481 spin_lock(&mos7840_port->pool_lock); 482 if (!mos7840_port->zombie) 483 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 484 spin_unlock(&mos7840_port->pool_lock); 485 if (result) { 486 dev_err(&urb->dev->dev, 487 "%s - Error %d submitting interrupt urb\n", 488 __func__, result); 489 } 490 } 491 492 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 493 __u16 *val) 494 { 495 struct usb_device *dev = mcs->port->serial->dev; 496 struct usb_ctrlrequest *dr = mcs->dr; 497 unsigned char *buffer = mcs->ctrl_buf; 498 int ret; 499 500 dr->bRequestType = MCS_RD_RTYPE; 501 dr->bRequest = MCS_RDREQ; 502 dr->wValue = cpu_to_le16(Wval); /* 0 */ 503 dr->wIndex = cpu_to_le16(reg); 504 dr->wLength = cpu_to_le16(2); 505 506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 507 (unsigned char *)dr, buffer, 2, 508 mos7840_control_callback, mcs); 509 mcs->control_urb->transfer_buffer_length = 2; 510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 511 return ret; 512 } 513 514 /***************************************************************************** 515 * mos7840_interrupt_callback 516 * this is the callback function for when we have received data on the 517 * interrupt endpoint. 518 *****************************************************************************/ 519 520 static void mos7840_interrupt_callback(struct urb *urb) 521 { 522 int result; 523 int length; 524 struct moschip_port *mos7840_port; 525 struct usb_serial *serial; 526 __u16 Data; 527 unsigned char *data; 528 __u8 sp[5], st; 529 int i, rv = 0; 530 __u16 wval, wreg = 0; 531 int status = urb->status; 532 533 dbg("%s", " : Entering\n"); 534 535 switch (status) { 536 case 0: 537 /* success */ 538 break; 539 case -ECONNRESET: 540 case -ENOENT: 541 case -ESHUTDOWN: 542 /* this urb is terminated, clean up */ 543 dbg("%s - urb shutting down with status: %d", __func__, 544 status); 545 return; 546 default: 547 dbg("%s - nonzero urb status received: %d", __func__, 548 status); 549 goto exit; 550 } 551 552 length = urb->actual_length; 553 data = urb->transfer_buffer; 554 555 serial = urb->context; 556 557 /* Moschip get 5 bytes 558 * Byte 1 IIR Port 1 (port.number is 0) 559 * Byte 2 IIR Port 2 (port.number is 1) 560 * Byte 3 IIR Port 3 (port.number is 2) 561 * Byte 4 IIR Port 4 (port.number is 3) 562 * Byte 5 FIFO status for both */ 563 564 if (length && length > 5) { 565 dbg("%s \n", "Wrong data !!!"); 566 return; 567 } 568 569 sp[0] = (__u8) data[0]; 570 sp[1] = (__u8) data[1]; 571 sp[2] = (__u8) data[2]; 572 sp[3] = (__u8) data[3]; 573 st = (__u8) data[4]; 574 575 for (i = 0; i < serial->num_ports; i++) { 576 mos7840_port = mos7840_get_port_private(serial->port[i]); 577 wval = 578 (((__u16) serial->port[i]->number - 579 (__u16) (serial->minor)) + 1) << 8; 580 if (mos7840_port->open) { 581 if (sp[i] & 0x01) { 582 dbg("SP%d No Interrupt !!!\n", i); 583 } else { 584 switch (sp[i] & 0x0f) { 585 case SERIAL_IIR_RLS: 586 dbg("Serial Port %d: Receiver status error or ", i); 587 dbg("address bit detected in 9-bit mode\n"); 588 mos7840_port->MsrLsr = 1; 589 wreg = LINE_STATUS_REGISTER; 590 break; 591 case SERIAL_IIR_MS: 592 dbg("Serial Port %d: Modem status change\n", i); 593 mos7840_port->MsrLsr = 0; 594 wreg = MODEM_STATUS_REGISTER; 595 break; 596 } 597 spin_lock(&mos7840_port->pool_lock); 598 if (!mos7840_port->zombie) { 599 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 600 } else { 601 spin_unlock(&mos7840_port->pool_lock); 602 return; 603 } 604 spin_unlock(&mos7840_port->pool_lock); 605 } 606 } 607 } 608 if (!(rv < 0)) 609 /* the completion handler for the control urb will resubmit */ 610 return; 611 exit: 612 result = usb_submit_urb(urb, GFP_ATOMIC); 613 if (result) { 614 dev_err(&urb->dev->dev, 615 "%s - Error %d submitting interrupt urb\n", 616 __func__, result); 617 } 618 } 619 620 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 621 const char *function) 622 { 623 if (!port) { 624 dbg("%s - port == NULL", function); 625 return -1; 626 } 627 if (!port->serial) { 628 dbg("%s - port->serial == NULL", function); 629 return -1; 630 } 631 632 return 0; 633 } 634 635 /* Inline functions to check the sanity of a pointer that is passed to us */ 636 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 637 const char *function) 638 { 639 if (!serial) { 640 dbg("%s - serial == NULL", function); 641 return -1; 642 } 643 if (!serial->type) { 644 dbg("%s - serial->type == NULL!", function); 645 return -1; 646 } 647 648 return 0; 649 } 650 651 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 652 const char *function) 653 { 654 /* if no port was specified, or it fails a paranoia check */ 655 if (!port || 656 mos7840_port_paranoia_check(port, function) || 657 mos7840_serial_paranoia_check(port->serial, function)) { 658 /* then say that we don't have a valid usb_serial thing, 659 * which will end up genrating -ENODEV return values */ 660 return NULL; 661 } 662 663 return port->serial; 664 } 665 666 /***************************************************************************** 667 * mos7840_bulk_in_callback 668 * this is the callback function for when we have received data on the 669 * bulk in endpoint. 670 *****************************************************************************/ 671 672 static void mos7840_bulk_in_callback(struct urb *urb) 673 { 674 int retval; 675 unsigned char *data; 676 struct usb_serial *serial; 677 struct usb_serial_port *port; 678 struct moschip_port *mos7840_port; 679 struct tty_struct *tty; 680 int status = urb->status; 681 682 if (status) { 683 dbg("nonzero read bulk status received: %d", status); 684 return; 685 } 686 687 mos7840_port = urb->context; 688 if (!mos7840_port) { 689 dbg("%s", "NULL mos7840_port pointer \n"); 690 return; 691 } 692 693 port = (struct usb_serial_port *)mos7840_port->port; 694 if (mos7840_port_paranoia_check(port, __func__)) { 695 dbg("%s", "Port Paranoia failed \n"); 696 return; 697 } 698 699 serial = mos7840_get_usb_serial(port, __func__); 700 if (!serial) { 701 dbg("%s\n", "Bad serial pointer "); 702 return; 703 } 704 705 dbg("%s\n", "Entering... \n"); 706 707 data = urb->transfer_buffer; 708 709 dbg("%s", "Entering ........... \n"); 710 711 if (urb->actual_length) { 712 tty = tty_port_tty_get(&mos7840_port->port->port); 713 if (tty) { 714 tty_buffer_request_room(tty, urb->actual_length); 715 tty_insert_flip_string(tty, data, urb->actual_length); 716 dbg(" %s \n", data); 717 tty_flip_buffer_push(tty); 718 tty_kref_put(tty); 719 } 720 mos7840_port->icount.rx += urb->actual_length; 721 smp_wmb(); 722 dbg("mos7840_port->icount.rx is %d:\n", 723 mos7840_port->icount.rx); 724 } 725 726 if (!mos7840_port->read_urb) { 727 dbg("%s", "URB KILLED !!!\n"); 728 return; 729 } 730 731 732 mos7840_port->read_urb->dev = serial->dev; 733 734 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 735 736 if (retval) { 737 dbg(" usb_submit_urb(read bulk) failed, retval = %d", 738 retval); 739 } 740 } 741 742 /***************************************************************************** 743 * mos7840_bulk_out_data_callback 744 * this is the callback function for when we have finished sending 745 * serial data on the bulk out endpoint. 746 *****************************************************************************/ 747 748 static void mos7840_bulk_out_data_callback(struct urb *urb) 749 { 750 struct moschip_port *mos7840_port; 751 struct tty_struct *tty; 752 int status = urb->status; 753 int i; 754 755 mos7840_port = urb->context; 756 spin_lock(&mos7840_port->pool_lock); 757 for (i = 0; i < NUM_URBS; i++) { 758 if (urb == mos7840_port->write_urb_pool[i]) { 759 mos7840_port->busy[i] = 0; 760 break; 761 } 762 } 763 spin_unlock(&mos7840_port->pool_lock); 764 765 if (status) { 766 dbg("nonzero write bulk status received:%d\n", status); 767 return; 768 } 769 770 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 771 dbg("%s", "Port Paranoia failed \n"); 772 return; 773 } 774 775 dbg("%s \n", "Entering ........."); 776 777 tty = tty_port_tty_get(&mos7840_port->port->port); 778 if (tty && mos7840_port->open) 779 tty_wakeup(tty); 780 tty_kref_put(tty); 781 782 } 783 784 /************************************************************************/ 785 /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ 786 /************************************************************************/ 787 #ifdef MCSSerialProbe 788 static int mos7840_serial_probe(struct usb_serial *serial, 789 const struct usb_device_id *id) 790 { 791 792 /*need to implement the mode_reg reading and updating\ 793 structures usb_serial_ device_type\ 794 (i.e num_ports, num_bulkin,bulkout etc) */ 795 /* Also we can update the changes attach */ 796 return 1; 797 } 798 #endif 799 800 /***************************************************************************** 801 * mos7840_open 802 * this function is called by the tty driver when a port is opened 803 * If successful, we return 0 804 * Otherwise we return a negative error number. 805 *****************************************************************************/ 806 807 static int mos7840_open(struct tty_struct *tty, 808 struct usb_serial_port *port, struct file *filp) 809 { 810 int response; 811 int j; 812 struct usb_serial *serial; 813 struct urb *urb; 814 __u16 Data; 815 int status; 816 struct moschip_port *mos7840_port; 817 struct moschip_port *port0; 818 819 if (mos7840_port_paranoia_check(port, __func__)) { 820 dbg("%s", "Port Paranoia failed \n"); 821 return -ENODEV; 822 } 823 824 serial = port->serial; 825 826 if (mos7840_serial_paranoia_check(serial, __func__)) { 827 dbg("%s", "Serial Paranoia failed \n"); 828 return -ENODEV; 829 } 830 831 mos7840_port = mos7840_get_port_private(port); 832 port0 = mos7840_get_port_private(serial->port[0]); 833 834 if (mos7840_port == NULL || port0 == NULL) 835 return -ENODEV; 836 837 usb_clear_halt(serial->dev, port->write_urb->pipe); 838 usb_clear_halt(serial->dev, port->read_urb->pipe); 839 port0->open_ports++; 840 841 /* Initialising the write urb pool */ 842 for (j = 0; j < NUM_URBS; ++j) { 843 urb = usb_alloc_urb(0, GFP_KERNEL); 844 mos7840_port->write_urb_pool[j] = urb; 845 846 if (urb == NULL) { 847 err("No more urbs???"); 848 continue; 849 } 850 851 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 852 GFP_KERNEL); 853 if (!urb->transfer_buffer) { 854 usb_free_urb(urb); 855 mos7840_port->write_urb_pool[j] = NULL; 856 err("%s-out of memory for urb buffers.", __func__); 857 continue; 858 } 859 } 860 861 /***************************************************************************** 862 * Initialize MCS7840 -- Write Init values to corresponding Registers 863 * 864 * Register Index 865 * 1 : IER 866 * 2 : FCR 867 * 3 : LCR 868 * 4 : MCR 869 * 870 * 0x08 : SP1/2 Control Reg 871 *****************************************************************************/ 872 873 /* NEED to check the following Block */ 874 875 Data = 0x0; 876 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 877 if (status < 0) { 878 dbg("Reading Spreg failed\n"); 879 return -1; 880 } 881 Data |= 0x80; 882 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 883 if (status < 0) { 884 dbg("writing Spreg failed\n"); 885 return -1; 886 } 887 888 Data &= ~0x80; 889 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 890 if (status < 0) { 891 dbg("writing Spreg failed\n"); 892 return -1; 893 } 894 /* End of block to be checked */ 895 896 Data = 0x0; 897 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 898 &Data); 899 if (status < 0) { 900 dbg("Reading Controlreg failed\n"); 901 return -1; 902 } 903 Data |= 0x08; /* Driver done bit */ 904 Data |= 0x20; /* rx_disable */ 905 status = mos7840_set_reg_sync(port, 906 mos7840_port->ControlRegOffset, Data); 907 if (status < 0) { 908 dbg("writing Controlreg failed\n"); 909 return -1; 910 } 911 /* do register settings here */ 912 /* Set all regs to the device default values. */ 913 /*********************************** 914 * First Disable all interrupts. 915 ***********************************/ 916 Data = 0x00; 917 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 918 if (status < 0) { 919 dbg("disableing interrupts failed\n"); 920 return -1; 921 } 922 /* Set FIFO_CONTROL_REGISTER to the default value */ 923 Data = 0x00; 924 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 925 if (status < 0) { 926 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 927 return -1; 928 } 929 930 Data = 0xcf; 931 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 932 if (status < 0) { 933 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 934 return -1; 935 } 936 937 Data = 0x03; 938 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 939 mos7840_port->shadowLCR = Data; 940 941 Data = 0x0b; 942 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 943 mos7840_port->shadowMCR = Data; 944 945 Data = 0x00; 946 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 947 mos7840_port->shadowLCR = Data; 948 949 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 950 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 951 952 Data = 0x0c; 953 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 954 955 Data = 0x0; 956 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 957 958 Data = 0x00; 959 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 960 961 Data = Data & ~SERIAL_LCR_DLAB; 962 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 963 mos7840_port->shadowLCR = Data; 964 965 /* clearing Bulkin and Bulkout Fifo */ 966 Data = 0x0; 967 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 968 969 Data = Data | 0x0c; 970 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 971 972 Data = Data & ~0x0c; 973 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 974 /* Finally enable all interrupts */ 975 Data = 0x0c; 976 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 977 978 /* clearing rx_disable */ 979 Data = 0x0; 980 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 981 &Data); 982 Data = Data & ~0x20; 983 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 984 Data); 985 986 /* rx_negate */ 987 Data = 0x0; 988 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 989 &Data); 990 Data = Data | 0x10; 991 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 992 Data); 993 994 /* force low_latency on so that our tty_push actually forces * 995 * the data through,otherwise it is scheduled, and with * 996 * high data rates (like with OHCI) data can get lost. */ 997 if (tty) 998 tty->low_latency = 1; 999 1000 /* Check to see if we've set up our endpoint info yet * 1001 * (can't set it up in mos7840_startup as the structures * 1002 * were not set up at that time.) */ 1003 if (port0->open_ports == 1) { 1004 if (serial->port[0]->interrupt_in_buffer == NULL) { 1005 /* set up interrupt urb */ 1006 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1007 serial->dev, 1008 usb_rcvintpipe(serial->dev, 1009 serial->port[0]->interrupt_in_endpointAddress), 1010 serial->port[0]->interrupt_in_buffer, 1011 serial->port[0]->interrupt_in_urb-> 1012 transfer_buffer_length, 1013 mos7840_interrupt_callback, 1014 serial, 1015 serial->port[0]->interrupt_in_urb->interval); 1016 1017 /* start interrupt read for mos7840 * 1018 * will continue as long as mos7840 is connected */ 1019 1020 response = 1021 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1022 GFP_KERNEL); 1023 if (response) { 1024 err("%s - Error %d submitting interrupt urb", 1025 __func__, response); 1026 } 1027 1028 } 1029 1030 } 1031 1032 /* see if we've set up our endpoint info yet * 1033 * (can't set it up in mos7840_startup as the * 1034 * structures were not set up at that time.) */ 1035 1036 dbg("port number is %d \n", port->number); 1037 dbg("serial number is %d \n", port->serial->minor); 1038 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); 1039 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); 1040 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); 1041 dbg("port's number in the device is %d\n", mos7840_port->port_num); 1042 mos7840_port->read_urb = port->read_urb; 1043 1044 /* set up our bulk in urb */ 1045 1046 usb_fill_bulk_urb(mos7840_port->read_urb, 1047 serial->dev, 1048 usb_rcvbulkpipe(serial->dev, 1049 port->bulk_in_endpointAddress), 1050 port->bulk_in_buffer, 1051 mos7840_port->read_urb->transfer_buffer_length, 1052 mos7840_bulk_in_callback, mos7840_port); 1053 1054 dbg("mos7840_open: bulkin endpoint is %d\n", 1055 port->bulk_in_endpointAddress); 1056 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1057 if (response) { 1058 err("%s - Error %d submitting control urb", __func__, 1059 response); 1060 } 1061 1062 /* initialize our wait queues */ 1063 init_waitqueue_head(&mos7840_port->wait_chase); 1064 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1065 1066 /* initialize our icount structure */ 1067 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1068 1069 /* initialize our port settings */ 1070 /* Must set to enable ints! */ 1071 mos7840_port->shadowMCR = MCR_MASTER_IE; 1072 /* send a open port command */ 1073 mos7840_port->open = 1; 1074 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1075 mos7840_port->icount.tx = 0; 1076 mos7840_port->icount.rx = 0; 1077 1078 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", 1079 serial, mos7840_port, port); 1080 1081 return 0; 1082 1083 } 1084 1085 /***************************************************************************** 1086 * mos7840_chars_in_buffer 1087 * this function is called by the tty driver when it wants to know how many 1088 * bytes of data we currently have outstanding in the port (data that has 1089 * been written, but hasn't made it out the port yet) 1090 * If successful, we return the number of bytes left to be written in the 1091 * system, 1092 * Otherwise we return zero. 1093 *****************************************************************************/ 1094 1095 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1096 { 1097 struct usb_serial_port *port = tty->driver_data; 1098 int i; 1099 int chars = 0; 1100 unsigned long flags; 1101 struct moschip_port *mos7840_port; 1102 1103 dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); 1104 1105 if (mos7840_port_paranoia_check(port, __func__)) { 1106 dbg("%s", "Invalid port \n"); 1107 return 0; 1108 } 1109 1110 mos7840_port = mos7840_get_port_private(port); 1111 if (mos7840_port == NULL) { 1112 dbg("%s \n", "mos7840_break:leaving ..........."); 1113 return 0; 1114 } 1115 1116 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1117 for (i = 0; i < NUM_URBS; ++i) 1118 if (mos7840_port->busy[i]) 1119 chars += URB_TRANSFER_BUFFER_SIZE; 1120 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1121 dbg("%s - returns %d", __func__, chars); 1122 return chars; 1123 1124 } 1125 1126 /************************************************************************ 1127 * 1128 * mos7840_block_until_tx_empty 1129 * 1130 * This function will block the close until one of the following: 1131 * 1. TX count are 0 1132 * 2. The mos7840 has stopped 1133 * 3. A timeout of 3 seconds without activity has expired 1134 * 1135 ************************************************************************/ 1136 static void mos7840_block_until_tx_empty(struct tty_struct *tty, 1137 struct moschip_port *mos7840_port) 1138 { 1139 int timeout = HZ / 10; 1140 int wait = 30; 1141 int count; 1142 1143 while (1) { 1144 1145 count = mos7840_chars_in_buffer(tty); 1146 1147 /* Check for Buffer status */ 1148 if (count <= 0) 1149 return; 1150 1151 /* Block the thread for a while */ 1152 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1153 timeout); 1154 1155 /* No activity.. count down section */ 1156 wait--; 1157 if (wait == 0) { 1158 dbg("%s - TIMEOUT", __func__); 1159 return; 1160 } else { 1161 /* Reset timeout value back to seconds */ 1162 wait = 30; 1163 } 1164 } 1165 } 1166 1167 /***************************************************************************** 1168 * mos7840_close 1169 * this function is called by the tty driver when a port is closed 1170 *****************************************************************************/ 1171 1172 static void mos7840_close(struct tty_struct *tty, 1173 struct usb_serial_port *port, struct file *filp) 1174 { 1175 struct usb_serial *serial; 1176 struct moschip_port *mos7840_port; 1177 struct moschip_port *port0; 1178 int j; 1179 __u16 Data; 1180 1181 dbg("%s\n", "mos7840_close:entering..."); 1182 1183 if (mos7840_port_paranoia_check(port, __func__)) { 1184 dbg("%s", "Port Paranoia failed \n"); 1185 return; 1186 } 1187 1188 serial = mos7840_get_usb_serial(port, __func__); 1189 if (!serial) { 1190 dbg("%s", "Serial Paranoia failed \n"); 1191 return; 1192 } 1193 1194 mos7840_port = mos7840_get_port_private(port); 1195 port0 = mos7840_get_port_private(serial->port[0]); 1196 1197 if (mos7840_port == NULL || port0 == NULL) 1198 return; 1199 1200 for (j = 0; j < NUM_URBS; ++j) 1201 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1202 1203 /* Freeing Write URBs */ 1204 for (j = 0; j < NUM_URBS; ++j) { 1205 if (mos7840_port->write_urb_pool[j]) { 1206 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1207 kfree(mos7840_port->write_urb_pool[j]-> 1208 transfer_buffer); 1209 1210 usb_free_urb(mos7840_port->write_urb_pool[j]); 1211 } 1212 } 1213 1214 if (serial->dev) 1215 /* flush and block until tx is empty */ 1216 mos7840_block_until_tx_empty(tty, mos7840_port); 1217 1218 /* While closing port, shutdown all bulk read, write * 1219 * and interrupt read if they exists */ 1220 if (serial->dev) { 1221 if (mos7840_port->write_urb) { 1222 dbg("%s", "Shutdown bulk write\n"); 1223 usb_kill_urb(mos7840_port->write_urb); 1224 } 1225 if (mos7840_port->read_urb) { 1226 dbg("%s", "Shutdown bulk read\n"); 1227 usb_kill_urb(mos7840_port->read_urb); 1228 } 1229 if ((&mos7840_port->control_urb)) { 1230 dbg("%s", "Shutdown control read\n"); 1231 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1232 } 1233 } 1234 /* if(mos7840_port->ctrl_buf != NULL) */ 1235 /* kfree(mos7840_port->ctrl_buf); */ 1236 port0->open_ports--; 1237 dbg("mos7840_num_open_ports in close%d:in port%d\n", 1238 port0->open_ports, port->number); 1239 if (port0->open_ports == 0) { 1240 if (serial->port[0]->interrupt_in_urb) { 1241 dbg("%s", "Shutdown interrupt_in_urb\n"); 1242 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1243 } 1244 } 1245 1246 if (mos7840_port->write_urb) { 1247 /* if this urb had a transfer buffer already (old tx) free it */ 1248 if (mos7840_port->write_urb->transfer_buffer != NULL) 1249 kfree(mos7840_port->write_urb->transfer_buffer); 1250 usb_free_urb(mos7840_port->write_urb); 1251 } 1252 1253 Data = 0x0; 1254 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1255 1256 Data = 0x00; 1257 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1258 1259 mos7840_port->open = 0; 1260 1261 dbg("%s \n", "Leaving ............"); 1262 } 1263 1264 /************************************************************************ 1265 * 1266 * mos7840_block_until_chase_response 1267 * 1268 * This function will block the close until one of the following: 1269 * 1. Response to our Chase comes from mos7840 1270 * 2. A timeout of 10 seconds without activity has expired 1271 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1272 * 1273 ************************************************************************/ 1274 1275 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1276 struct moschip_port *mos7840_port) 1277 { 1278 int timeout = 1 * HZ; 1279 int wait = 10; 1280 int count; 1281 1282 while (1) { 1283 count = mos7840_chars_in_buffer(tty); 1284 1285 /* Check for Buffer status */ 1286 if (count <= 0) 1287 return; 1288 1289 /* Block the thread for a while */ 1290 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1291 timeout); 1292 /* No activity.. count down section */ 1293 wait--; 1294 if (wait == 0) { 1295 dbg("%s - TIMEOUT", __func__); 1296 return; 1297 } else { 1298 /* Reset timeout value back to seconds */ 1299 wait = 10; 1300 } 1301 } 1302 1303 } 1304 1305 /***************************************************************************** 1306 * mos7840_break 1307 * this function sends a break to the port 1308 *****************************************************************************/ 1309 static void mos7840_break(struct tty_struct *tty, int break_state) 1310 { 1311 struct usb_serial_port *port = tty->driver_data; 1312 unsigned char data; 1313 struct usb_serial *serial; 1314 struct moschip_port *mos7840_port; 1315 1316 dbg("%s \n", "Entering ..........."); 1317 dbg("mos7840_break: Start\n"); 1318 1319 if (mos7840_port_paranoia_check(port, __func__)) { 1320 dbg("%s", "Port Paranoia failed \n"); 1321 return; 1322 } 1323 1324 serial = mos7840_get_usb_serial(port, __func__); 1325 if (!serial) { 1326 dbg("%s", "Serial Paranoia failed \n"); 1327 return; 1328 } 1329 1330 mos7840_port = mos7840_get_port_private(port); 1331 1332 if (mos7840_port == NULL) 1333 return; 1334 1335 if (serial->dev) 1336 /* flush and block until tx is empty */ 1337 mos7840_block_until_chase_response(tty, mos7840_port); 1338 1339 if (break_state == -1) 1340 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1341 else 1342 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1343 1344 mos7840_port->shadowLCR = data; 1345 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", 1346 mos7840_port->shadowLCR); 1347 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1348 mos7840_port->shadowLCR); 1349 1350 return; 1351 } 1352 1353 /***************************************************************************** 1354 * mos7840_write_room 1355 * this function is called by the tty driver when it wants to know how many 1356 * bytes of data we can accept for a specific port. 1357 * If successful, we return the amount of room that we have for this port 1358 * Otherwise we return a negative error number. 1359 *****************************************************************************/ 1360 1361 static int mos7840_write_room(struct tty_struct *tty) 1362 { 1363 struct usb_serial_port *port = tty->driver_data; 1364 int i; 1365 int room = 0; 1366 unsigned long flags; 1367 struct moschip_port *mos7840_port; 1368 1369 dbg("%s \n", " mos7840_write_room:entering ..........."); 1370 1371 if (mos7840_port_paranoia_check(port, __func__)) { 1372 dbg("%s", "Invalid port \n"); 1373 dbg("%s \n", " mos7840_write_room:leaving ..........."); 1374 return -1; 1375 } 1376 1377 mos7840_port = mos7840_get_port_private(port); 1378 if (mos7840_port == NULL) { 1379 dbg("%s \n", "mos7840_break:leaving ..........."); 1380 return -1; 1381 } 1382 1383 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1384 for (i = 0; i < NUM_URBS; ++i) { 1385 if (!mos7840_port->busy[i]) 1386 room += URB_TRANSFER_BUFFER_SIZE; 1387 } 1388 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1389 1390 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1391 dbg("%s - returns %d", __func__, room); 1392 return room; 1393 1394 } 1395 1396 /***************************************************************************** 1397 * mos7840_write 1398 * this function is called by the tty driver when data should be written to 1399 * the port. 1400 * If successful, we return the number of bytes written, otherwise we 1401 * return a negative error number. 1402 *****************************************************************************/ 1403 1404 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1405 const unsigned char *data, int count) 1406 { 1407 int status; 1408 int i; 1409 int bytes_sent = 0; 1410 int transfer_size; 1411 unsigned long flags; 1412 1413 struct moschip_port *mos7840_port; 1414 struct usb_serial *serial; 1415 struct urb *urb; 1416 /* __u16 Data; */ 1417 const unsigned char *current_position = data; 1418 unsigned char *data1; 1419 dbg("%s \n", "entering ..........."); 1420 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1421 mos7840_port->shadowLCR); */ 1422 1423 #ifdef NOTMOS7840 1424 Data = 0x00; 1425 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1426 mos7840_port->shadowLCR = Data; 1427 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); 1428 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1429 mos7840_port->shadowLCR); 1430 1431 /* Data = 0x03; */ 1432 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1433 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1434 1435 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1436 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1437 1438 /* Data = 0x0c; */ 1439 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1440 Data = 0x00; 1441 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1442 dbg("mos7840_write:DLL value is %x\n", Data); 1443 1444 Data = 0x0; 1445 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1446 dbg("mos7840_write:DLM value is %x\n", Data); 1447 1448 Data = Data & ~SERIAL_LCR_DLAB; 1449 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1450 mos7840_port->shadowLCR); 1451 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1452 #endif 1453 1454 if (mos7840_port_paranoia_check(port, __func__)) { 1455 dbg("%s", "Port Paranoia failed \n"); 1456 return -1; 1457 } 1458 1459 serial = port->serial; 1460 if (mos7840_serial_paranoia_check(serial, __func__)) { 1461 dbg("%s", "Serial Paranoia failed \n"); 1462 return -1; 1463 } 1464 1465 mos7840_port = mos7840_get_port_private(port); 1466 if (mos7840_port == NULL) { 1467 dbg("%s", "mos7840_port is NULL\n"); 1468 return -1; 1469 } 1470 1471 /* try to find a free urb in the list */ 1472 urb = NULL; 1473 1474 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1475 for (i = 0; i < NUM_URBS; ++i) { 1476 if (!mos7840_port->busy[i]) { 1477 mos7840_port->busy[i] = 1; 1478 urb = mos7840_port->write_urb_pool[i]; 1479 dbg("\nURB:%d", i); 1480 break; 1481 } 1482 } 1483 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1484 1485 if (urb == NULL) { 1486 dbg("%s - no more free urbs", __func__); 1487 goto exit; 1488 } 1489 1490 if (urb->transfer_buffer == NULL) { 1491 urb->transfer_buffer = 1492 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1493 1494 if (urb->transfer_buffer == NULL) { 1495 err("%s no more kernel memory...", __func__); 1496 goto exit; 1497 } 1498 } 1499 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1500 1501 memcpy(urb->transfer_buffer, current_position, transfer_size); 1502 1503 /* fill urb with data and submit */ 1504 usb_fill_bulk_urb(urb, 1505 serial->dev, 1506 usb_sndbulkpipe(serial->dev, 1507 port->bulk_out_endpointAddress), 1508 urb->transfer_buffer, 1509 transfer_size, 1510 mos7840_bulk_out_data_callback, mos7840_port); 1511 1512 data1 = urb->transfer_buffer; 1513 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); 1514 1515 /* send it down the pipe */ 1516 status = usb_submit_urb(urb, GFP_ATOMIC); 1517 1518 if (status) { 1519 mos7840_port->busy[i] = 0; 1520 err("%s - usb_submit_urb(write bulk) failed with status = %d", 1521 __func__, status); 1522 bytes_sent = status; 1523 goto exit; 1524 } 1525 bytes_sent = transfer_size; 1526 mos7840_port->icount.tx += transfer_size; 1527 smp_wmb(); 1528 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1529 exit: 1530 return bytes_sent; 1531 1532 } 1533 1534 /***************************************************************************** 1535 * mos7840_throttle 1536 * this function is called by the tty driver when it wants to stop the data 1537 * being read from the port. 1538 *****************************************************************************/ 1539 1540 static void mos7840_throttle(struct tty_struct *tty) 1541 { 1542 struct usb_serial_port *port = tty->driver_data; 1543 struct moschip_port *mos7840_port; 1544 int status; 1545 1546 if (mos7840_port_paranoia_check(port, __func__)) { 1547 dbg("%s", "Invalid port \n"); 1548 return; 1549 } 1550 1551 dbg("- port %d\n", port->number); 1552 1553 mos7840_port = mos7840_get_port_private(port); 1554 1555 if (mos7840_port == NULL) 1556 return; 1557 1558 if (!mos7840_port->open) { 1559 dbg("%s\n", "port not opened"); 1560 return; 1561 } 1562 1563 dbg("%s", "Entering .......... \n"); 1564 1565 /* if we are implementing XON/XOFF, send the stop character */ 1566 if (I_IXOFF(tty)) { 1567 unsigned char stop_char = STOP_CHAR(tty); 1568 status = mos7840_write(tty, port, &stop_char, 1); 1569 if (status <= 0) 1570 return; 1571 } 1572 /* if we are implementing RTS/CTS, toggle that line */ 1573 if (tty->termios->c_cflag & CRTSCTS) { 1574 mos7840_port->shadowMCR &= ~MCR_RTS; 1575 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1576 mos7840_port->shadowMCR); 1577 if (status < 0) 1578 return; 1579 } 1580 1581 return; 1582 } 1583 1584 /***************************************************************************** 1585 * mos7840_unthrottle 1586 * this function is called by the tty driver when it wants to resume 1587 * the data being read from the port (called after mos7840_throttle is 1588 * called) 1589 *****************************************************************************/ 1590 static void mos7840_unthrottle(struct tty_struct *tty) 1591 { 1592 struct usb_serial_port *port = tty->driver_data; 1593 int status; 1594 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1595 1596 if (mos7840_port_paranoia_check(port, __func__)) { 1597 dbg("%s", "Invalid port \n"); 1598 return; 1599 } 1600 1601 if (mos7840_port == NULL) 1602 return; 1603 1604 if (!mos7840_port->open) { 1605 dbg("%s - port not opened", __func__); 1606 return; 1607 } 1608 1609 dbg("%s", "Entering .......... \n"); 1610 1611 /* if we are implementing XON/XOFF, send the start character */ 1612 if (I_IXOFF(tty)) { 1613 unsigned char start_char = START_CHAR(tty); 1614 status = mos7840_write(tty, port, &start_char, 1); 1615 if (status <= 0) 1616 return; 1617 } 1618 1619 /* if we are implementing RTS/CTS, toggle that line */ 1620 if (tty->termios->c_cflag & CRTSCTS) { 1621 mos7840_port->shadowMCR |= MCR_RTS; 1622 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1623 mos7840_port->shadowMCR); 1624 if (status < 0) 1625 return; 1626 } 1627 } 1628 1629 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1630 { 1631 struct usb_serial_port *port = tty->driver_data; 1632 struct moschip_port *mos7840_port; 1633 unsigned int result; 1634 __u16 msr; 1635 __u16 mcr; 1636 int status; 1637 mos7840_port = mos7840_get_port_private(port); 1638 1639 dbg("%s - port %d", __func__, port->number); 1640 1641 if (mos7840_port == NULL) 1642 return -ENODEV; 1643 1644 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1645 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1646 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1647 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1648 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1649 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1650 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1651 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1652 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1653 1654 dbg("%s - 0x%04X", __func__, result); 1655 1656 return result; 1657 } 1658 1659 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1660 unsigned int set, unsigned int clear) 1661 { 1662 struct usb_serial_port *port = tty->driver_data; 1663 struct moschip_port *mos7840_port; 1664 unsigned int mcr; 1665 int status; 1666 1667 dbg("%s - port %d", __func__, port->number); 1668 1669 mos7840_port = mos7840_get_port_private(port); 1670 1671 if (mos7840_port == NULL) 1672 return -ENODEV; 1673 1674 /* FIXME: What locks the port registers ? */ 1675 mcr = mos7840_port->shadowMCR; 1676 if (clear & TIOCM_RTS) 1677 mcr &= ~MCR_RTS; 1678 if (clear & TIOCM_DTR) 1679 mcr &= ~MCR_DTR; 1680 if (clear & TIOCM_LOOP) 1681 mcr &= ~MCR_LOOPBACK; 1682 1683 if (set & TIOCM_RTS) 1684 mcr |= MCR_RTS; 1685 if (set & TIOCM_DTR) 1686 mcr |= MCR_DTR; 1687 if (set & TIOCM_LOOP) 1688 mcr |= MCR_LOOPBACK; 1689 1690 mos7840_port->shadowMCR = mcr; 1691 1692 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1693 if (status < 0) { 1694 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 1695 return status; 1696 } 1697 1698 return 0; 1699 } 1700 1701 /***************************************************************************** 1702 * mos7840_calc_baud_rate_divisor 1703 * this function calculates the proper baud rate divisor for the specified 1704 * baud rate. 1705 *****************************************************************************/ 1706 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1707 __u16 *clk_sel_val) 1708 { 1709 1710 dbg("%s - %d", __func__, baudRate); 1711 1712 if (baudRate <= 115200) { 1713 *divisor = 115200 / baudRate; 1714 *clk_sel_val = 0x0; 1715 } 1716 if ((baudRate > 115200) && (baudRate <= 230400)) { 1717 *divisor = 230400 / baudRate; 1718 *clk_sel_val = 0x10; 1719 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1720 *divisor = 403200 / baudRate; 1721 *clk_sel_val = 0x20; 1722 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1723 *divisor = 460800 / baudRate; 1724 *clk_sel_val = 0x30; 1725 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1726 *divisor = 806400 / baudRate; 1727 *clk_sel_val = 0x40; 1728 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1729 *divisor = 921600 / baudRate; 1730 *clk_sel_val = 0x50; 1731 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1732 *divisor = 1572864 / baudRate; 1733 *clk_sel_val = 0x60; 1734 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1735 *divisor = 3145728 / baudRate; 1736 *clk_sel_val = 0x70; 1737 } 1738 return 0; 1739 1740 #ifdef NOTMCS7840 1741 1742 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1743 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1744 *divisor = mos7840_divisor_table[i].Divisor; 1745 return 0; 1746 } 1747 } 1748 1749 /* After trying for all the standard baud rates * 1750 * Try calculating the divisor for this baud rate */ 1751 1752 if (baudrate > 75 && baudrate < 230400) { 1753 /* get the divisor */ 1754 custom = (__u16) (230400L / baudrate); 1755 1756 /* Check for round off */ 1757 round1 = (__u16) (2304000L / baudrate); 1758 round = (__u16) (round1 - (custom * 10)); 1759 if (round > 4) 1760 custom++; 1761 *divisor = custom; 1762 1763 dbg(" Baud %d = %d\n", baudrate, custom); 1764 return 0; 1765 } 1766 1767 dbg("%s\n", " Baud calculation Failed..."); 1768 return -1; 1769 #endif 1770 } 1771 1772 /***************************************************************************** 1773 * mos7840_send_cmd_write_baud_rate 1774 * this function sends the proper command to change the baud rate of the 1775 * specified port. 1776 *****************************************************************************/ 1777 1778 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1779 int baudRate) 1780 { 1781 int divisor = 0; 1782 int status; 1783 __u16 Data; 1784 unsigned char number; 1785 __u16 clk_sel_val; 1786 struct usb_serial_port *port; 1787 1788 if (mos7840_port == NULL) 1789 return -1; 1790 1791 port = (struct usb_serial_port *)mos7840_port->port; 1792 if (mos7840_port_paranoia_check(port, __func__)) { 1793 dbg("%s", "Invalid port \n"); 1794 return -1; 1795 } 1796 1797 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1798 dbg("%s", "Invalid Serial \n"); 1799 return -1; 1800 } 1801 1802 dbg("%s", "Entering .......... \n"); 1803 1804 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1805 1806 dbg("%s - port = %d, baud = %d", __func__, 1807 mos7840_port->port->number, baudRate); 1808 /* reset clk_uart_sel in spregOffset */ 1809 if (baudRate > 115200) { 1810 #ifdef HW_flow_control 1811 /* NOTE: need to see the pther register to modify */ 1812 /* setting h/w flow control bit to 1 */ 1813 Data = 0x2b; 1814 mos7840_port->shadowMCR = Data; 1815 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1816 Data); 1817 if (status < 0) { 1818 dbg("Writing spreg failed in set_serial_baud\n"); 1819 return -1; 1820 } 1821 #endif 1822 1823 } else { 1824 #ifdef HW_flow_control 1825 / *setting h/w flow control bit to 0 */ 1826 Data = 0xb; 1827 mos7840_port->shadowMCR = Data; 1828 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1829 Data); 1830 if (status < 0) { 1831 dbg("Writing spreg failed in set_serial_baud\n"); 1832 return -1; 1833 } 1834 #endif 1835 1836 } 1837 1838 if (1) { /* baudRate <= 115200) */ 1839 clk_sel_val = 0x0; 1840 Data = 0x0; 1841 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1842 &clk_sel_val); 1843 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1844 &Data); 1845 if (status < 0) { 1846 dbg("reading spreg failed in set_serial_baud\n"); 1847 return -1; 1848 } 1849 Data = (Data & 0x8f) | clk_sel_val; 1850 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1851 Data); 1852 if (status < 0) { 1853 dbg("Writing spreg failed in set_serial_baud\n"); 1854 return -1; 1855 } 1856 /* Calculate the Divisor */ 1857 1858 if (status) { 1859 err("%s - bad baud rate", __func__); 1860 dbg("%s\n", "bad baud rate"); 1861 return status; 1862 } 1863 /* Enable access to divisor latch */ 1864 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1865 mos7840_port->shadowLCR = Data; 1866 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1867 1868 /* Write the divisor */ 1869 Data = (unsigned char)(divisor & 0xff); 1870 dbg("set_serial_baud Value to write DLL is %x\n", Data); 1871 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1872 1873 Data = (unsigned char)((divisor & 0xff00) >> 8); 1874 dbg("set_serial_baud Value to write DLM is %x\n", Data); 1875 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1876 1877 /* Disable access to divisor latch */ 1878 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1879 mos7840_port->shadowLCR = Data; 1880 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1881 1882 } 1883 return status; 1884 } 1885 1886 /***************************************************************************** 1887 * mos7840_change_port_settings 1888 * This routine is called to set the UART on the device to match 1889 * the specified new settings. 1890 *****************************************************************************/ 1891 1892 static void mos7840_change_port_settings(struct tty_struct *tty, 1893 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1894 { 1895 int baud; 1896 unsigned cflag; 1897 unsigned iflag; 1898 __u8 lData; 1899 __u8 lParity; 1900 __u8 lStop; 1901 int status; 1902 __u16 Data; 1903 struct usb_serial_port *port; 1904 struct usb_serial *serial; 1905 1906 if (mos7840_port == NULL) 1907 return; 1908 1909 port = (struct usb_serial_port *)mos7840_port->port; 1910 1911 if (mos7840_port_paranoia_check(port, __func__)) { 1912 dbg("%s", "Invalid port \n"); 1913 return; 1914 } 1915 1916 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1917 dbg("%s", "Invalid Serial \n"); 1918 return; 1919 } 1920 1921 serial = port->serial; 1922 1923 dbg("%s - port %d", __func__, mos7840_port->port->number); 1924 1925 if (!mos7840_port->open) { 1926 dbg("%s - port not opened", __func__); 1927 return; 1928 } 1929 1930 dbg("%s", "Entering .......... \n"); 1931 1932 lData = LCR_BITS_8; 1933 lStop = LCR_STOP_1; 1934 lParity = LCR_PAR_NONE; 1935 1936 cflag = tty->termios->c_cflag; 1937 iflag = tty->termios->c_iflag; 1938 1939 /* Change the number of bits */ 1940 if (cflag & CSIZE) { 1941 switch (cflag & CSIZE) { 1942 case CS5: 1943 lData = LCR_BITS_5; 1944 break; 1945 1946 case CS6: 1947 lData = LCR_BITS_6; 1948 break; 1949 1950 case CS7: 1951 lData = LCR_BITS_7; 1952 break; 1953 default: 1954 case CS8: 1955 lData = LCR_BITS_8; 1956 break; 1957 } 1958 } 1959 /* Change the Parity bit */ 1960 if (cflag & PARENB) { 1961 if (cflag & PARODD) { 1962 lParity = LCR_PAR_ODD; 1963 dbg("%s - parity = odd", __func__); 1964 } else { 1965 lParity = LCR_PAR_EVEN; 1966 dbg("%s - parity = even", __func__); 1967 } 1968 1969 } else { 1970 dbg("%s - parity = none", __func__); 1971 } 1972 1973 if (cflag & CMSPAR) 1974 lParity = lParity | 0x20; 1975 1976 /* Change the Stop bit */ 1977 if (cflag & CSTOPB) { 1978 lStop = LCR_STOP_2; 1979 dbg("%s - stop bits = 2", __func__); 1980 } else { 1981 lStop = LCR_STOP_1; 1982 dbg("%s - stop bits = 1", __func__); 1983 } 1984 1985 /* Update the LCR with the correct value */ 1986 mos7840_port->shadowLCR &= 1987 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1988 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1989 1990 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", 1991 mos7840_port->shadowLCR); 1992 /* Disable Interrupts */ 1993 Data = 0x00; 1994 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1995 1996 Data = 0x00; 1997 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1998 1999 Data = 0xcf; 2000 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2001 2002 /* Send the updated LCR value to the mos7840 */ 2003 Data = mos7840_port->shadowLCR; 2004 2005 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2006 2007 Data = 0x00b; 2008 mos7840_port->shadowMCR = Data; 2009 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2010 Data = 0x00b; 2011 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2012 2013 /* set up the MCR register and send it to the mos7840 */ 2014 2015 mos7840_port->shadowMCR = MCR_MASTER_IE; 2016 if (cflag & CBAUD) 2017 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2018 2019 if (cflag & CRTSCTS) 2020 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2021 else 2022 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2023 2024 Data = mos7840_port->shadowMCR; 2025 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2026 2027 /* Determine divisor based on baud rate */ 2028 baud = tty_get_baud_rate(tty); 2029 2030 if (!baud) { 2031 /* pick a default, any default... */ 2032 dbg("%s\n", "Picked default baud..."); 2033 baud = 9600; 2034 } 2035 2036 dbg("%s - baud rate = %d", __func__, baud); 2037 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2038 2039 /* Enable Interrupts */ 2040 Data = 0x0c; 2041 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2042 2043 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2044 mos7840_port->read_urb->dev = serial->dev; 2045 2046 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2047 2048 if (status) { 2049 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2050 status); 2051 } 2052 } 2053 wake_up(&mos7840_port->delta_msr_wait); 2054 mos7840_port->delta_msr_cond = 1; 2055 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", 2056 mos7840_port->shadowLCR); 2057 2058 return; 2059 } 2060 2061 /***************************************************************************** 2062 * mos7840_set_termios 2063 * this function is called by the tty driver when it wants to change 2064 * the termios structure 2065 *****************************************************************************/ 2066 2067 static void mos7840_set_termios(struct tty_struct *tty, 2068 struct usb_serial_port *port, 2069 struct ktermios *old_termios) 2070 { 2071 int status; 2072 unsigned int cflag; 2073 struct usb_serial *serial; 2074 struct moschip_port *mos7840_port; 2075 dbg("mos7840_set_termios: START\n"); 2076 if (mos7840_port_paranoia_check(port, __func__)) { 2077 dbg("%s", "Invalid port \n"); 2078 return; 2079 } 2080 2081 serial = port->serial; 2082 2083 if (mos7840_serial_paranoia_check(serial, __func__)) { 2084 dbg("%s", "Invalid Serial \n"); 2085 return; 2086 } 2087 2088 mos7840_port = mos7840_get_port_private(port); 2089 2090 if (mos7840_port == NULL) 2091 return; 2092 2093 if (!mos7840_port->open) { 2094 dbg("%s - port not opened", __func__); 2095 return; 2096 } 2097 2098 dbg("%s\n", "setting termios - "); 2099 2100 cflag = tty->termios->c_cflag; 2101 2102 dbg("%s - clfag %08x iflag %08x", __func__, 2103 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2104 dbg("%s - old clfag %08x old iflag %08x", __func__, 2105 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2106 dbg("%s - port %d", __func__, port->number); 2107 2108 /* change the port settings to the new ones specified */ 2109 2110 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2111 2112 if (!mos7840_port->read_urb) { 2113 dbg("%s", "URB KILLED !!!!!\n"); 2114 return; 2115 } 2116 2117 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2118 mos7840_port->read_urb->dev = serial->dev; 2119 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2120 if (status) { 2121 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2122 status); 2123 } 2124 } 2125 return; 2126 } 2127 2128 /***************************************************************************** 2129 * mos7840_get_lsr_info - get line status register info 2130 * 2131 * Purpose: Let user call ioctl() to get info when the UART physically 2132 * is emptied. On bus types like RS485, the transmitter must 2133 * release the bus after transmitting. This must be done when 2134 * the transmit shift register is empty, not be done when the 2135 * transmit holding register is empty. This functionality 2136 * allows an RS485 driver to be written in user space. 2137 *****************************************************************************/ 2138 2139 static int mos7840_get_lsr_info(struct tty_struct *tty, 2140 unsigned int __user *value) 2141 { 2142 int count; 2143 unsigned int result = 0; 2144 2145 count = mos7840_chars_in_buffer(tty); 2146 if (count == 0) { 2147 dbg("%s -- Empty", __func__); 2148 result = TIOCSER_TEMT; 2149 } 2150 2151 if (copy_to_user(value, &result, sizeof(int))) 2152 return -EFAULT; 2153 return 0; 2154 } 2155 2156 /***************************************************************************** 2157 * mos7840_set_modem_info 2158 * function to set modem info 2159 *****************************************************************************/ 2160 2161 /* FIXME: Should be using the model control hooks */ 2162 2163 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2164 unsigned int cmd, unsigned int __user *value) 2165 { 2166 unsigned int mcr; 2167 unsigned int arg; 2168 __u16 Data; 2169 int status; 2170 struct usb_serial_port *port; 2171 2172 if (mos7840_port == NULL) 2173 return -1; 2174 2175 port = (struct usb_serial_port *)mos7840_port->port; 2176 if (mos7840_port_paranoia_check(port, __func__)) { 2177 dbg("%s", "Invalid port \n"); 2178 return -1; 2179 } 2180 2181 mcr = mos7840_port->shadowMCR; 2182 2183 if (copy_from_user(&arg, value, sizeof(int))) 2184 return -EFAULT; 2185 2186 switch (cmd) { 2187 case TIOCMBIS: 2188 if (arg & TIOCM_RTS) 2189 mcr |= MCR_RTS; 2190 if (arg & TIOCM_DTR) 2191 mcr |= MCR_RTS; 2192 if (arg & TIOCM_LOOP) 2193 mcr |= MCR_LOOPBACK; 2194 break; 2195 2196 case TIOCMBIC: 2197 if (arg & TIOCM_RTS) 2198 mcr &= ~MCR_RTS; 2199 if (arg & TIOCM_DTR) 2200 mcr &= ~MCR_RTS; 2201 if (arg & TIOCM_LOOP) 2202 mcr &= ~MCR_LOOPBACK; 2203 break; 2204 2205 case TIOCMSET: 2206 /* turn off the RTS and DTR and LOOPBACK 2207 * and then only turn on what was asked to */ 2208 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2209 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2210 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2211 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2212 break; 2213 } 2214 2215 mos7840_port->shadowMCR = mcr; 2216 2217 Data = mos7840_port->shadowMCR; 2218 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2219 if (status < 0) { 2220 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 2221 return -1; 2222 } 2223 2224 return 0; 2225 } 2226 2227 /***************************************************************************** 2228 * mos7840_get_modem_info 2229 * function to get modem info 2230 *****************************************************************************/ 2231 2232 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2233 unsigned int __user *value) 2234 { 2235 unsigned int result = 0; 2236 __u16 msr; 2237 unsigned int mcr = mos7840_port->shadowMCR; 2238 mos7840_get_uart_reg(mos7840_port->port, 2239 MODEM_STATUS_REGISTER, &msr); 2240 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2241 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2242 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2243 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2244 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2245 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2246 2247 dbg("%s -- %x", __func__, result); 2248 2249 if (copy_to_user(value, &result, sizeof(int))) 2250 return -EFAULT; 2251 return 0; 2252 } 2253 2254 /***************************************************************************** 2255 * mos7840_get_serial_info 2256 * function to get information about serial port 2257 *****************************************************************************/ 2258 2259 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2260 struct serial_struct __user *retinfo) 2261 { 2262 struct serial_struct tmp; 2263 2264 if (mos7840_port == NULL) 2265 return -1; 2266 2267 if (!retinfo) 2268 return -EFAULT; 2269 2270 memset(&tmp, 0, sizeof(tmp)); 2271 2272 tmp.type = PORT_16550A; 2273 tmp.line = mos7840_port->port->serial->minor; 2274 tmp.port = mos7840_port->port->number; 2275 tmp.irq = 0; 2276 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2277 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2278 tmp.baud_base = 9600; 2279 tmp.close_delay = 5 * HZ; 2280 tmp.closing_wait = 30 * HZ; 2281 2282 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2283 return -EFAULT; 2284 return 0; 2285 } 2286 2287 /***************************************************************************** 2288 * SerialIoctl 2289 * this function handles any ioctl calls to the driver 2290 *****************************************************************************/ 2291 2292 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2293 unsigned int cmd, unsigned long arg) 2294 { 2295 struct usb_serial_port *port = tty->driver_data; 2296 void __user *argp = (void __user *)arg; 2297 struct moschip_port *mos7840_port; 2298 2299 struct async_icount cnow; 2300 struct async_icount cprev; 2301 struct serial_icounter_struct icount; 2302 int mosret = 0; 2303 2304 if (mos7840_port_paranoia_check(port, __func__)) { 2305 dbg("%s", "Invalid port \n"); 2306 return -1; 2307 } 2308 2309 mos7840_port = mos7840_get_port_private(port); 2310 2311 if (mos7840_port == NULL) 2312 return -1; 2313 2314 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2315 2316 switch (cmd) { 2317 /* return number of bytes available */ 2318 2319 case TIOCSERGETLSR: 2320 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2321 return mos7840_get_lsr_info(tty, argp); 2322 return 0; 2323 2324 /* FIXME: use the modem hooks and remove this */ 2325 case TIOCMBIS: 2326 case TIOCMBIC: 2327 case TIOCMSET: 2328 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, 2329 port->number); 2330 mosret = 2331 mos7840_set_modem_info(mos7840_port, cmd, argp); 2332 return mosret; 2333 2334 case TIOCMGET: 2335 dbg("%s (%d) TIOCMGET", __func__, port->number); 2336 return mos7840_get_modem_info(mos7840_port, argp); 2337 2338 case TIOCGSERIAL: 2339 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2340 return mos7840_get_serial_info(mos7840_port, argp); 2341 2342 case TIOCSSERIAL: 2343 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2344 break; 2345 2346 case TIOCMIWAIT: 2347 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2348 cprev = mos7840_port->icount; 2349 while (1) { 2350 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2351 mos7840_port->delta_msr_cond = 0; 2352 wait_event_interruptible(mos7840_port->delta_msr_wait, 2353 (mos7840_port-> 2354 delta_msr_cond == 1)); 2355 2356 /* see if a signal did it */ 2357 if (signal_pending(current)) 2358 return -ERESTARTSYS; 2359 cnow = mos7840_port->icount; 2360 smp_rmb(); 2361 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2362 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2363 return -EIO; /* no change => error */ 2364 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2365 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2366 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2367 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2368 return 0; 2369 } 2370 cprev = cnow; 2371 } 2372 /* NOTREACHED */ 2373 break; 2374 2375 case TIOCGICOUNT: 2376 cnow = mos7840_port->icount; 2377 smp_rmb(); 2378 icount.cts = cnow.cts; 2379 icount.dsr = cnow.dsr; 2380 icount.rng = cnow.rng; 2381 icount.dcd = cnow.dcd; 2382 icount.rx = cnow.rx; 2383 icount.tx = cnow.tx; 2384 icount.frame = cnow.frame; 2385 icount.overrun = cnow.overrun; 2386 icount.parity = cnow.parity; 2387 icount.brk = cnow.brk; 2388 icount.buf_overrun = cnow.buf_overrun; 2389 2390 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2391 port->number, icount.rx, icount.tx); 2392 if (copy_to_user(argp, &icount, sizeof(icount))) 2393 return -EFAULT; 2394 return 0; 2395 default: 2396 break; 2397 } 2398 return -ENOIOCTLCMD; 2399 } 2400 2401 static int mos7840_calc_num_ports(struct usb_serial *serial) 2402 { 2403 int mos7840_num_ports = 0; 2404 2405 dbg("numberofendpoints: %d \n", 2406 (int)serial->interface->cur_altsetting->desc.bNumEndpoints); 2407 dbg("numberofendpoints: %d \n", 2408 (int)serial->interface->altsetting->desc.bNumEndpoints); 2409 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2410 mos7840_num_ports = serial->num_ports = 2; 2411 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2412 serial->num_bulk_in = 4; 2413 serial->num_bulk_out = 4; 2414 mos7840_num_ports = serial->num_ports = 4; 2415 } 2416 2417 return mos7840_num_ports; 2418 } 2419 2420 /**************************************************************************** 2421 * mos7840_startup 2422 ****************************************************************************/ 2423 2424 static int mos7840_startup(struct usb_serial *serial) 2425 { 2426 struct moschip_port *mos7840_port; 2427 struct usb_device *dev; 2428 int i, status; 2429 2430 __u16 Data; 2431 dbg("%s \n", " mos7840_startup :entering.........."); 2432 2433 if (!serial) { 2434 dbg("%s\n", "Invalid Handler"); 2435 return -1; 2436 } 2437 2438 dev = serial->dev; 2439 2440 dbg("%s\n", "Entering..."); 2441 2442 /* we set up the pointers to the endpoints in the mos7840_open * 2443 * function, as the structures aren't created yet. */ 2444 2445 /* set up port private structures */ 2446 for (i = 0; i < serial->num_ports; ++i) { 2447 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2448 if (mos7840_port == NULL) { 2449 err("%s - Out of memory", __func__); 2450 status = -ENOMEM; 2451 i--; /* don't follow NULL pointer cleaning up */ 2452 goto error; 2453 } 2454 2455 /* Initialize all port interrupt end point to port 0 int 2456 * endpoint. Our device has only one interrupt end point 2457 * common to all port */ 2458 2459 mos7840_port->port = serial->port[i]; 2460 mos7840_set_port_private(serial->port[i], mos7840_port); 2461 spin_lock_init(&mos7840_port->pool_lock); 2462 2463 mos7840_port->port_num = ((serial->port[i]->number - 2464 (serial->port[i]->serial->minor)) + 2465 1); 2466 2467 if (mos7840_port->port_num == 1) { 2468 mos7840_port->SpRegOffset = 0x0; 2469 mos7840_port->ControlRegOffset = 0x1; 2470 mos7840_port->DcrRegOffset = 0x4; 2471 } else if ((mos7840_port->port_num == 2) 2472 && (serial->num_ports == 4)) { 2473 mos7840_port->SpRegOffset = 0x8; 2474 mos7840_port->ControlRegOffset = 0x9; 2475 mos7840_port->DcrRegOffset = 0x16; 2476 } else if ((mos7840_port->port_num == 2) 2477 && (serial->num_ports == 2)) { 2478 mos7840_port->SpRegOffset = 0xa; 2479 mos7840_port->ControlRegOffset = 0xb; 2480 mos7840_port->DcrRegOffset = 0x19; 2481 } else if ((mos7840_port->port_num == 3) 2482 && (serial->num_ports == 4)) { 2483 mos7840_port->SpRegOffset = 0xa; 2484 mos7840_port->ControlRegOffset = 0xb; 2485 mos7840_port->DcrRegOffset = 0x19; 2486 } else if ((mos7840_port->port_num == 4) 2487 && (serial->num_ports == 4)) { 2488 mos7840_port->SpRegOffset = 0xc; 2489 mos7840_port->ControlRegOffset = 0xd; 2490 mos7840_port->DcrRegOffset = 0x1c; 2491 } 2492 mos7840_dump_serial_port(mos7840_port); 2493 mos7840_set_port_private(serial->port[i], mos7840_port); 2494 2495 /* enable rx_disable bit in control register */ 2496 status = mos7840_get_reg_sync(serial->port[i], 2497 mos7840_port->ControlRegOffset, &Data); 2498 if (status < 0) { 2499 dbg("Reading ControlReg failed status-0x%x\n", status); 2500 break; 2501 } else 2502 dbg("ControlReg Reading success val is %x, status%d\n", 2503 Data, status); 2504 Data |= 0x08; /* setting driver done bit */ 2505 Data |= 0x04; /* sp1_bit to have cts change reflect in 2506 modem status reg */ 2507 2508 /* Data |= 0x20; //rx_disable bit */ 2509 status = mos7840_set_reg_sync(serial->port[i], 2510 mos7840_port->ControlRegOffset, Data); 2511 if (status < 0) { 2512 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2513 break; 2514 } else 2515 dbg("ControlReg Writing success(rx_disable) status%d\n", 2516 status); 2517 2518 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2519 and 0x24 in DCR3 */ 2520 Data = 0x01; 2521 status = mos7840_set_reg_sync(serial->port[i], 2522 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2523 if (status < 0) { 2524 dbg("Writing DCR0 failed status-0x%x\n", status); 2525 break; 2526 } else 2527 dbg("DCR0 Writing success status%d\n", status); 2528 2529 Data = 0x05; 2530 status = mos7840_set_reg_sync(serial->port[i], 2531 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2532 if (status < 0) { 2533 dbg("Writing DCR1 failed status-0x%x\n", status); 2534 break; 2535 } else 2536 dbg("DCR1 Writing success status%d\n", status); 2537 2538 Data = 0x24; 2539 status = mos7840_set_reg_sync(serial->port[i], 2540 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2541 if (status < 0) { 2542 dbg("Writing DCR2 failed status-0x%x\n", status); 2543 break; 2544 } else 2545 dbg("DCR2 Writing success status%d\n", status); 2546 2547 /* write values in clkstart0x0 and clkmulti 0x20 */ 2548 Data = 0x0; 2549 status = mos7840_set_reg_sync(serial->port[i], 2550 CLK_START_VALUE_REGISTER, Data); 2551 if (status < 0) { 2552 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2553 break; 2554 } else 2555 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2556 2557 Data = 0x20; 2558 status = mos7840_set_reg_sync(serial->port[i], 2559 CLK_MULTI_REGISTER, Data); 2560 if (status < 0) { 2561 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", 2562 status); 2563 goto error; 2564 } else 2565 dbg("CLK_MULTI_REGISTER Writing success status%d\n", 2566 status); 2567 2568 /* write value 0x0 to scratchpad register */ 2569 Data = 0x00; 2570 status = mos7840_set_uart_reg(serial->port[i], 2571 SCRATCH_PAD_REGISTER, Data); 2572 if (status < 0) { 2573 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", 2574 status); 2575 break; 2576 } else 2577 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", 2578 status); 2579 2580 /* Zero Length flag register */ 2581 if ((mos7840_port->port_num != 1) 2582 && (serial->num_ports == 2)) { 2583 2584 Data = 0xff; 2585 status = mos7840_set_reg_sync(serial->port[i], 2586 (__u16) (ZLP_REG1 + 2587 ((__u16)mos7840_port->port_num)), Data); 2588 dbg("ZLIP offset%x\n", 2589 (__u16) (ZLP_REG1 + 2590 ((__u16) mos7840_port->port_num))); 2591 if (status < 0) { 2592 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2593 i + 2, status); 2594 break; 2595 } else 2596 dbg("ZLP_REG%d Writing success status%d\n", 2597 i + 2, status); 2598 } else { 2599 Data = 0xff; 2600 status = mos7840_set_reg_sync(serial->port[i], 2601 (__u16) (ZLP_REG1 + 2602 ((__u16)mos7840_port->port_num) - 0x1), Data); 2603 dbg("ZLIP offset%x\n", 2604 (__u16) (ZLP_REG1 + 2605 ((__u16) mos7840_port->port_num) - 0x1)); 2606 if (status < 0) { 2607 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2608 i + 1, status); 2609 break; 2610 } else 2611 dbg("ZLP_REG%d Writing success status%d\n", 2612 i + 1, status); 2613 2614 } 2615 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2616 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2617 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2618 GFP_KERNEL); 2619 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2620 !mos7840_port->dr) { 2621 status = -ENOMEM; 2622 goto error; 2623 } 2624 } 2625 2626 /* Zero Length flag enable */ 2627 Data = 0x0f; 2628 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2629 if (status < 0) { 2630 dbg("Writing ZLP_REG5 failed status-0x%x\n", status); 2631 goto error; 2632 } else 2633 dbg("ZLP_REG5 Writing success status%d\n", status); 2634 2635 /* setting configuration feature to one */ 2636 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2637 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2638 return 0; 2639 error: 2640 for (/* nothing */; i >= 0; i--) { 2641 mos7840_port = mos7840_get_port_private(serial->port[i]); 2642 2643 kfree(mos7840_port->dr); 2644 kfree(mos7840_port->ctrl_buf); 2645 usb_free_urb(mos7840_port->control_urb); 2646 kfree(mos7840_port); 2647 serial->port[i] = NULL; 2648 } 2649 return status; 2650 } 2651 2652 /**************************************************************************** 2653 * mos7840_shutdown 2654 * This function is called whenever the device is removed from the usb bus. 2655 ****************************************************************************/ 2656 2657 static void mos7840_shutdown(struct usb_serial *serial) 2658 { 2659 int i; 2660 unsigned long flags; 2661 struct moschip_port *mos7840_port; 2662 dbg("%s \n", " shutdown :entering.........."); 2663 2664 if (!serial) { 2665 dbg("%s", "Invalid Handler \n"); 2666 return; 2667 } 2668 2669 /* check for the ports to be closed,close the ports and disconnect */ 2670 2671 /* free private structure allocated for serial port * 2672 * stop reads and writes on all ports */ 2673 2674 for (i = 0; i < serial->num_ports; ++i) { 2675 mos7840_port = mos7840_get_port_private(serial->port[i]); 2676 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2677 mos7840_port->zombie = 1; 2678 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2679 usb_kill_urb(mos7840_port->control_urb); 2680 kfree(mos7840_port->ctrl_buf); 2681 kfree(mos7840_port->dr); 2682 kfree(mos7840_port); 2683 mos7840_set_port_private(serial->port[i], NULL); 2684 } 2685 2686 dbg("%s\n", "Thank u :: "); 2687 2688 } 2689 2690 static struct usb_driver io_driver = { 2691 .name = "mos7840", 2692 .probe = usb_serial_probe, 2693 .disconnect = usb_serial_disconnect, 2694 .id_table = moschip_id_table_combined, 2695 .no_dynamic_id = 1, 2696 }; 2697 2698 static struct usb_serial_driver moschip7840_4port_device = { 2699 .driver = { 2700 .owner = THIS_MODULE, 2701 .name = "mos7840", 2702 }, 2703 .description = DRIVER_DESC, 2704 .usb_driver = &io_driver, 2705 .id_table = moschip_port_id_table, 2706 .num_ports = 4, 2707 .open = mos7840_open, 2708 .close = mos7840_close, 2709 .write = mos7840_write, 2710 .write_room = mos7840_write_room, 2711 .chars_in_buffer = mos7840_chars_in_buffer, 2712 .throttle = mos7840_throttle, 2713 .unthrottle = mos7840_unthrottle, 2714 .calc_num_ports = mos7840_calc_num_ports, 2715 #ifdef MCSSerialProbe 2716 .probe = mos7840_serial_probe, 2717 #endif 2718 .ioctl = mos7840_ioctl, 2719 .set_termios = mos7840_set_termios, 2720 .break_ctl = mos7840_break, 2721 .tiocmget = mos7840_tiocmget, 2722 .tiocmset = mos7840_tiocmset, 2723 .attach = mos7840_startup, 2724 .shutdown = mos7840_shutdown, 2725 .read_bulk_callback = mos7840_bulk_in_callback, 2726 .read_int_callback = mos7840_interrupt_callback, 2727 }; 2728 2729 /**************************************************************************** 2730 * moschip7840_init 2731 * This is called by the module subsystem, or on startup to initialize us 2732 ****************************************************************************/ 2733 static int __init moschip7840_init(void) 2734 { 2735 int retval; 2736 2737 dbg("%s \n", " mos7840_init :entering.........."); 2738 2739 /* Register with the usb serial */ 2740 retval = usb_serial_register(&moschip7840_4port_device); 2741 2742 if (retval) 2743 goto failed_port_device_register; 2744 2745 dbg("%s\n", "Entring..."); 2746 info(DRIVER_DESC " " DRIVER_VERSION); 2747 2748 /* Register with the usb */ 2749 retval = usb_register(&io_driver); 2750 if (retval == 0) { 2751 dbg("%s\n", "Leaving..."); 2752 return 0; 2753 } 2754 usb_serial_deregister(&moschip7840_4port_device); 2755 failed_port_device_register: 2756 return retval; 2757 } 2758 2759 /**************************************************************************** 2760 * moschip7840_exit 2761 * Called when the driver is about to be unloaded. 2762 ****************************************************************************/ 2763 static void __exit moschip7840_exit(void) 2764 { 2765 2766 dbg("%s \n", " mos7840_exit :entering.........."); 2767 2768 usb_deregister(&io_driver); 2769 2770 usb_serial_deregister(&moschip7840_4port_device); 2771 2772 dbg("%s\n", "Entring..."); 2773 } 2774 2775 module_init(moschip7840_init); 2776 module_exit(moschip7840_exit); 2777 2778 /* Module information */ 2779 MODULE_DESCRIPTION(DRIVER_DESC); 2780 MODULE_LICENSE("GPL"); 2781 2782 module_param(debug, bool, S_IRUGO | S_IWUSR); 2783 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2784